class_docstr: Abstract agent class that can interact with a batch of envs.
code: def observe(
      self, obs: Any, reward: float, done: bool, reset: bool
  ) -> None:
      self.batch_observe([obs], [reward], [done], [reset])
  
imports: import contextlib
  import os
  from abc import ABCMeta, abstractmethod, abstractproperty
  from typing import Any, List, Optional, Sequence, Tuple
  import torch
label_desc: Use image node_id 2 for calling the BatchAgent obj's underlying member method code with example usage: obj.observe(obs, reward, done, reset) without return types